The correct abbreviation for Queensland, Australia is QLD.

QSL is a Q code for radio communication and radio broadcasting. It means "I am acknowledging receipt."

The meaning of QSL has several different meanings.One being a confirmed,a slang word used online.Another Qatar Stars League,Quebec Sing Language,Quantum spin liquid,and Queensland State League.

There is a long list of "Q-signals", used in place of common statements or phrases, that

originated during the period when most communication was in the form of Morse Code.

'QSL' means 'I confirm that I received your transmission'.

Many ham operators worldwide often exchange post cards, as 'hard copy' proof of

their meeting on the air. These cards are also referred to as 'QSL cards'.

They are asking if you acknowledge receipt or that they acknowledged receipt.

I believe you are referring to QSL or QSO cards- which mean, in Ham radio jargon- Quested Signal listened ( roughly) or Quested Signal Observed) for commericial stations these are printed postcards with the station"s call letters, for example- WCBS-FM and frequency allotment- in that case 101.1MGH ( FM) band. the radio stations, if you write them, will probably send you a verification card. this whole thing is a sub-hobby within the radio-listening ( not necessarily Ham or Two-Way hobby- and was very popular in the thirties. QSL and QSO cards are more-or-less interchangeable terms. Most of the old-time (Q) ciphers are no longer used.(these were both verbal and in CW code form.).